javaweb(三十七)——获得MySQL数据库自动生成的主键

测试脚本如下：

1  create table test1
2 ( 3 id int primary key auto_increment, 4 name varchar(20) 5 );

　　测试代码：

 1 package me.gacl.demo;
 2 
 3 import java.sql.Connection;  4 import java.sql.PreparedStatement;  5 import java.sql.ResultSet;  6 import me.gacl.utils.JdbcUtils;  7  8 public class Test {  9 public static void main(String[] args) { 10 Connection conn = null; 11 PreparedStatement st = null; 12 ResultSet rs = null; 13 try{ 14 conn = JdbcUtils.getConnection(); 15 String sql = "insert into test1(name) values(?)"; 16 st = conn.prepareStatement(sql); 17 st.setString(1, "aaa"); 18  st.executeUpdate(); 19 //获取数据库自动生成的主键 20 rs = st.getGeneratedKeys(); 21 if(rs.next()){ 22 System.out.println(rs.getInt(1)); 23  } 24 }catch (Exception e) { 25  e.printStackTrace(); 26 }finally{ 27  JdbcUtils.release(conn, st, rs); 28  } 29  } 30 }